Oil-burner.



W. R. RAY.

OIL BURNER.

APPLICATION FILED MAY I0, 1915.

Patented. May 23, 1916.

IN VENTOR WiZZzamfEflay WILLIAM R. BAY, OF SAN FNCISCO, CALIFORNIA.

OILBU LTWLGEQ.

Specification of Letters Patent.

Patented May as, Win.

Application filed May 10, 1915. .Serial No. 27,056.

To all whom it may concern Be it known that T, WILLIAM R. RAY, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Oil-Burners, of which the following is a specification.

This invention relates to an oil burner.

Une of the objects of the present invention is to provide a simple, substantial oil burner of the rotary type, in which the oil is ejected and atomized by the combined action of centrifugal force and air; and particularly to construct a burner provided with a plurality of centrifugal atomizers to which oil may be delivered in small 01' great quantities.

Another object of the invention is to provide a novel form of contractible air nozzle by which the volume of air admitted to the furnace may be regulated to maintain the highest degree of combustion when increasing or decreasing the oil feed.

Another object of the invention is to provide an air driven turbine, from which power is transmitted to the centrifugal oil atomizers, together with means for Icy-pass? ing and regulating the air passing through the turbine.

Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a central vertical section on line 1-1 of Fig. 2. Fig. 2 is a sideielevation of the burner, taken from the nozzle side. Fig. 3 is a fragmentary view of the disk valve 19. Fig. 4 is a similar view of the turbine wheel. Fig. 5 is a side elevation of one of the cams 89.

A indicates a casing, which is centrally divided by a partition plate 2 to form two compartments 3 and 4. Secured on the front side of the casing, by screws 5, and adapted to project partly into a furnace (not here shown), is a contractible nozzle, generally indicated at B. Formed integrally with said nozzle, and centrally positioned interiorly of same, is a bearing member 6,'in which is journaled a hollow shaft 7. Mounted interiorly of compartment 4, and secured on the shaft, is a rotor 8 of the turbine type, and secured on the inner end of the shaft, and projecting a slight distance beyond the end of the contractible nozzle, is a burner head 9, The burner head consists of a cup or cylindricalshaped head, exteriorly of which is formed a. plurality of annular flanges, such. as indicated at 10. These flanges are slightly convex in shape and communicate with the interior of the burner head by means of a plurality of radially disposed openings 11.

Extending through the casing A and the hollow shaft 6 is an oil delivering pipe 12. This pipe extends into the burner head and is connected at the other end with a suitable source of fuel supply, such as indicated at 13. The lower end of easing A is connected with a source of air'supply, such as a fan or blower (not here shown). The air thus provided enters compartment 3 in the direction of arrows a. From here the air passes through a plurality of nozzlelike openings 14 formed in the partition plate and'is in this manner forced against the'vanes 15 of the turbine wheel 8, causing this, with connected shaft 7 and burner head 9, to revolve at a high velocity. Oil admitted through pipe 12 to the interior of the burner is thus projected outwardly through. the radial openings 11 against the outer facesof the annular flanges 10 and is liberated from the outer lips or edges of same in the direction of arrows b. The air passing-through the turbine wheel is in this instance permitted to escape through a central opening 16 formed on the front side of the casing. It then passes through the con tractible nozzle B and is ejected from the outer end of same directly into the furnace in the direction of arrows c or at approximately right angles tothe discharge of the oil from the burner head. The volume of air ejected by the contractible nozzle, being much greater than the volume of oil liberated from the burner head, will pick up the highly atomized particles of oil projected and carry them forward into the furnace. The oil is thus further atomized as it is broken up by the force of the air column- 21; @penings 20 are adapted to move into andout of register" with the'nozzle open- .ings it formed inthe partition plate and the openingsl21 are adaptedto move into or out of register with a plurality of bypass ports 22 formed in the partition plate.

Secured on one side of the disk is a gear mitted to the pinion through the hand-wheel 25will cause the disk valve 19 to turn about the hub 18 and cause ports 20 and 21 to move into-or out of register with their re- I spective communicating nozzles and by-pass ports. The volume of air admitted to the turbine wheel and the volume of air bypassed exteriorly of same can thus be controlled to a nicety and the. speed of the turbine wheel, with connected shaft and burner head, may at the same time be varied to suit conditions.

Positioned interiorly of the contractible nozzle and formed integral with plate 30 and bearing 6 is a plurality of radially disosed guide vanes 26, in this instance four in number. .These are provided for the purpose of guiding or directing the air discharging from the nozzle, or, in other words, toprevent any whirling action to take. place in the nozzle. The air passing through the turbinewheel and followingsame to a certain extent rotates or swirls within compartment 4: at a high speed and this swirling action would continue interior'ly of the contracting nozzle unless the guide vanes 26 are provided. This swirling action'is very objectionable 'as' it"has a tendency to swirl with the discharging oil-from the burner head, thus reducing the atomiz-ing or breaking up tendency which is produced when the air is ejected in a straight path.

The contraction ofthe nozzle with relation to the burner head is .accomplished in the following manner: Pivotally mounted in lugs 29, formed on the main nozzle supporting plate 30, are four rocker arms, such as indicated at 31. The outer end of each rocker arm is divided into two sections, each of which is slotted, as at 31, to receive a blade 32. These blades engage. each side of an adjacent vane 26 and I are slidable thereon, being held in engagement'therewith by springs 32* as will hereinafter be described. Formed on the inner end. ofeach rocker arm-31 is an outwardlyextending arm 33, and turnably mounted, by means of a hand-wheel 34,'shaft 35, crank arm 36, and

link 37, is a disk 38. Said disk is provided with a plurality of cam members 39, one for each arm 33, and these cams will engage their respective arms 33 when the disk is" turned, causing the rocker arms 31 to be moved or rocked on their pivots in lugs 29 and causing the blades 32 to slide up'and down on the exterior faces of the vanes 26, or, in other words, contract or expand the opening surrounding the burner head. The direction of the air volume discharging through the nozzle may in this mannerbe adjusted to a nicety and the shape and size of the flame regulated. The rocker arms 31 are movedin' one direction by means of cams- 39 and are retracted by springs40.

A burner constructedas here shown is capable of handling a small or large quantity of oil. To use an example, it. may be stated that a burner of a certain size is capable of successfully burning anywhere from one to fifteen gallons of oil perrhour. If a small quantity of oil is being fed to' the burner it WIll practically all escape through the first set of radially disposed openings 11 and be discharged by centrifugal force over the surface of the first annular flange. If more oil is delivered than can be taken care of by the first set of radial openings, it will naturally escape through the second set and finally through the third set of openings when the maximum quantity of'oilis being delivered.

The oil projected by a burner constructed as here shown is highly atomized and vaporized before it enters the furnace, as it is first broken up by centrifugal action and then by the discharging air of the nozzle which car ries it'in a forward direction into the furnalce. The provision of the several discharging flanges employed aids in atomizing the oil, as the quantity of oil delivered is distributedand discharged from a lurality of surfaces before it is subjected breaking up tendency of the discharging air. The speed or number of revolutions imparted to the burner head is also easily regulated in the present instance as it is only necessary to move the disk valve 19 to increase or decrease the nozzle openings 1 f communicating with the vanes of the turbine wheel.

The materials and finish of the several parts of the burner are such as the experience and judgment ofthe manufacturer may dictate. I

I wish it understood that various changes in form, proportions, and minor details of to the 3 construction may be resorted to within the I I claim and desire to secure byLetters Patent is 1. In a centrifugal burner, a hollow head,

a plurality of annular shaped flanges formed- -.on the exterior of the head, said head having a plurality of radially disposed .perfora- I tions formed therein in alinement with the forward .face of each flange, means forrevolving the head, and means for delivering oil interiorly of the head.

' '2. In a centrifugal burner, the combinaend projecting through through the nozzle between the atomizer and nozzle, and means for contracting or exill pending the nozzle about the atomizer.

3. ln a-centrifugal burner, the combination with a centrifugal atomizer, of a contractible nozzle surrounding the atomizer, said nozzle-com rising a plate, a plurality of radially dispose vanes formed on the plate, rocker arms pivotally mounted intermediate of the vanes, a pair of telescoping blades engageable With the vanes carried by each rocker arm, means for rocking the rocker arms in unison, and means for forcing an air current through the nozzle. 7

4:. lln a centrifugal burner, the combination With a centrifugal atomizer, "of a contractible nozzle surrounding the atomizer, said nozzle comprising a plate, a plurality of radially disposed vanes formed on the plate, rocker arms pivotally mounted intermediate of the vanes, a pair of telescoping blades engageable With the vanes carried by each rocker arm, a disk turnably mounted on the nozzle, a plurality of cam members carried by'the disk and engageable. With the rocker arms to rock the arms, means for turning the disk to move the cams into and out of engagement with their respective rocker arms, and means for forcing an air current through the nozzle.

5. A centrifugal oil burner comprising a casing adapted to be connected With a source of air supply, a partition plate in the casing dividing it into two compartments, said plate having one set of nozzle openings formed therein and a set of by-pass.openings formed therein, a shaft journaled in the casing, a turbine Wheel secured on the shaft and operated by the air from the nozzle openings, a disk valve turnably mounted exteriorly of the partition .plate adapted to direct the air through the nozzle openings or throu hthe by-pass openings or partly through oth, a centrifugal atomizer secured on the shaft, means for delivering oil to said atomizer, an air nozzle partly surrounding the atomizer, and means for directing the air discharging from the turbine through the air nozzle.

6. A centrifugal oil burner comprising a casing adapted to be connected with a source of air supply, a partition plate in the casing dividing it into two compartments, said plate having one set of nozzle openings formed therein and a set of bypass openings formed therein, a shaft journaled in the -casing,ra turbine Wheel secured on the shaft and operated by the air from the nozzle openings, a disk valve turnably mounted exteriorly of the partition plate adapted to direct the air through the nozzle openings or through the by-pass openings or partly through both, a centrifugal atomizer secured on the shaft, means for delivering oil to said atomizer, an air nozzle partly surrounding the atomizer, means for directing the air discharging from theturbine through the air nozzle, and means for contracting or expanding the air nozzle.

lln a centrifugal burner, the combination of a nozzle, a centrifugal atomizer projecting beyond the nozzle, and spaced from same, means for delivering oil to the atomizer, means for forcing an air current through the nozzle between'the atomizer and nozzle, and a plurality of guide vanes interiorly of the nozzle. I

8. A centrifugal oil burner comprising a casing adapted to be connected with a source of air supply, a partition plate in the casing dividing it into two compartments, said plate having nozzle openings formed therein, a shaft journaled in the casing, a turbine Wheel secured on the shaft and driven by the air fromthe nozzle openings, a centrifugal atomizer secured on the shaft,means for delivering oil to said atomizer, an air nozzle partly surrounding the atomizer, and means for directing the air discharging from the turbine through the air nozzle.

9. ln a centrifugal burner, the combination of a nozzle, a centrifugal atomizer mounted interior of the nozzle and spaced from same, means for delivering oil to the atomizer, means for forcing an air current through the nozzle between the atomizer and nozzle, and means in the nozzle to guide the air and cause it to discharge in a line axial With the nozzle.

10. lln a centrifugal burner, the combination of a nozzle, a centrifugal atomizer mounted interior of the nozzle and spaced from same, means for delivering oil to the atomizer, means for forcing an air current through the nozzle between the atomizer and nozzle, and means in the nozzle to guide the air and cause it to discharge in a line axial With the nozzle, said means comprising a plurality of guide vanes interiorly ofthe nozzle.

In testimony whereof I have hereunto set my handin the presence of two subscrlbing Witnesses.

LLIAM R. RAY. Witnesses:

W. W. HEALEY,

M. E. EWING. 

